单片机课程设计万年历数字时钟

1、单片机课程设计-万年历、数字时钟采用MAX7221可以极大的节省I/O口线，同时DS1302时钟芯片可以提供精确的时间信息 汇编语言程序编写DSRST BIT P1.0 DSCLK BIT P1.1 DSIO BIT P2.2 DIN BIT P2.5 CS BIT P2.6 CLK BIT P2.7 D158 EQU 30H D70 EQU 31H ADDRESS EQU 32hCONTENT EQU 33hCOMMAND EQU 34hSECOND equ 35hMINITE equ 36hHOUR equ 37hORG 0000HLJMP MAINORG 0030HMAIN: LCALL

2、 INTI7221LCALL INTI1302LOOP: LCALL READ1302LCALL CONVERTLCALL DELAYLCALL DISPLAYLCALL DELAYSJMP LOOP ;DS1302初始化 INTI1302:MOV ADDRESS, #8EH MOV CONTENT, #00H LCALL SENT_BYTEMOV ADDRESS, #90HMOV CONTENT, #0A7H ;慢充电寄存器 LCALL SENT_BYTEREAD1302: MOV ADDRESS, #81hLCALL REV_BYTEMOV SECOND, AMOV ADDRESS, #8

3、3hLCALL REV_BYTEMOV MINITE, AMOV ADDRESS, #85hLCALL REV_BYTEMOV HOUR, ARET SENT_BYTE: CLR DSRSTCLR CNOPCLR DSCLKNOPSETB DSRSTMOV A, ADDRESSMOV R3, #2MOV R2, #8LOOP0: RRC AMOV DSIO, CSETB DSCLKNOPCLR DSCLKDJNZ R2, LOOP0MOV A, CONTENTMOV R2, #8DJNZ R3, LOOP0CLR DSRSTRETREV_BYTE: PUSH 02HCLR DSRSTCLR C

4、CLR DSCLKNOPSETB DSRSTMOV A, ADDRESSMOV R2, #8RDDS0: RRC AMOV DSIO, CSETB DSCLKNOPCLR DSCLKDJNZ R2, RDDS0CLR AMOV R2, #8RDDS1: MOV C, DSIORRC ASETB DSCLKNOPCLR DSCLKDJNZ R2, RDDS1CLR DSRSTPOP 02HRETCONVERT:mov a, houranl a, #0f0hswap amov 40h, amov a, houranl a, #0fhmov 41h, amov a, miniteanl a, #0f

5、0hswap amov 42h, amov a, miniteanl a, #0fhmov 43h, amov a, secondanl a, #0f0hswap amov 44h, amov a, secondanl a, #0fhmov 45h, aretINTI7221: MOV D158, #09H MOV D70, #0FFH LCALL WRITE MOV D158, #0AH MOV D70, #0EH LCALL WRITEMOV D158, #0BH MOV D70, #05H LCALL WRITEMOV D158, #0CH MOV D70, #01H LCALL WRI

6、TEMOV D158, #0FH MOV D70, #00H LCALL WRITERETDISPLAY:MOV R6, #6 MOV R5, #0mov R0, #40hDIGIT: MOV A, R5MOV DPTR, #TAB1MOVC A, A+DPTRMOV D158, A MOV D70, R0 INC R0LCALL WRITE INC R5DJNZ R6, DIGITRET ORG 0250HWRITE: CLR CSMOV A, D158MOV R3, #2LOOP00: MOV R2, #8LOOP11: CLR CLKRLC AMOV DIN, CSETB CLKDJNZ R2, LOOP11MOV A, D70DJNZ R3, LOOP00SETB CS RETTAB1: DB 01H,02H,03H,04H,05H,06HTAB2: DB 00H,01H,02H,03H,04H,